Jar-seal.



0'. R. KEERAN.

JAR SEAL.

APPLICATION FILED FEB. 5, 1910. I

976,659. Patented Nov. 22, 1910.

awe/Mow I mom CHARLES R. KEERAN, OFBLOOMINGTON, ILLINOIS.

JAR-SEAL.

Specification of Letters Patent.

Patented Nov. 22, 1610.

Application filed February 5, 1910. SeriatNo. 542,184.

To all whom it may concern:

Be it known that I, CHARLES R. KEERAN, a citizen of the United States,residing at Bloomington, in the county of McLean and State of Illinois,have invented newand useful Improvements in Jar-Seals, of which thefollowing is a specification.

This invention relates to bottle or jar seals of the vacuum type, andone of its ebier-ts is to provide a simple, cheap and effective seal ofthis type which may be applied with ease convenience and facility.

Another object of the invention is to provide a seal which may be heldin position either permanently or temporarily until the vacuum is formedby a screw cap or cover of the type commonly employed as a closure forMason ars.

Still another object ofv the invention is to provide a seal which willbe held positively by the cap from slipping laterally on the rim edge ofthe jar whereby a positive seal. is insured and the necessity of usingwide and expensive sealing rings or gaskets obviated.

The invention consists of the features of construction, combination andarrangement of parts hereinafter fully described and claimed, referencebeing had to the accompanying drawings, in which Figure 1 is a verticalsection through a screw cap in inverted position with the seal thereinready for application to a Fig. 2 is a similar view, showing the cap andseal applied to a jar. Fig. 3 is a view like Fig. 2, showing a modifiedform of holding I eferring to the drawing, 1 designates a bottle or jarof that type having its neck portion provided with external screwthreads 2 and a plane or flat transverse rim edge 3, which threads areadapted to be engaged by the threaded flange t of a screw cap or cover5, the jar and cap herein shown being of the well-known Mason type. Thecap is provided with a porcelain lining (5 bearing against the innerside of its crown or top wall and spaced at its peripheral edge from theadjacent portion 7 of the flange 4, such space providing an annularintervening recess 8. As shown, the lining 6 projects a little below theportion 7 which is connected with the underlying portion of the flangeof the cap by a connecting outwardly and downwardly inclined or beveledportion 9.

The seal embodying my invention comprises a sheet metal disk 10, thebody portion of which is of somewhat greater diameter than the diameterof the mouth opening of the jar, so that when in sealing position 1twill project, slightly over upon the rim edge 3. This disk is formed atits outer edge with I an annular olis et portion disposed above theplane thereof, said offset portion forming a V-shaped or tapered rim l1having a short outer depending vertical flange l2 and a longer innerdepending vertical flange 13, the latter connecting the inner inclinedwalls of said V-shaped rim with the edge of the body of the disk 10. Bythis construction an annular retaining groove 14 is formed between theflanges 12 and 13 to receive the upper portion of a seallng rlng orgasket 15, which ring or gasket may be made of any suitable elasticmaterial, such as rubber, but is preferably composed of a fibrousmaterial, such as asbestos or blotting paper, combined with a fusiblewax, such as ordinary sealing wax, which will melt at .a temperatureabove nor mal atmosphere temperature. The gasketmay be held within thegroove and the disk and gasket so connected in this manner as a completearticle of manufacture ready for use.

In employing the invention, the cap or cover 5 may be used for eitherpermanently or temporarily holding the seal in position. i

As a convenient manner of applying the cap and seal, the cap may beinverted, as shown in Fig. 1 and the seal dropped in an invertedposition therein. When this is done the beveled outer wall of the rim 11of the seal will engage the beveled portion 9 of the flange of the cap,which will operate as a guide to bring said rim 11 into engagementtherewith and with the adjacent edge of the lining 6, so that the apexof the rim will project slightly into the groove 8, such surfaces of thecap forming a seat for the rim of the seal by which the seal, on ingsimply dropped therein, will be auto atically guided into position forapplication.

to the jar, without care or any specified manipulation on the part ofthe operator. The cap with the contained seal is then simply turned overto normal position above the mouth of the jar, as shown in Fig. 2, andscrewed down upon the same, the bottom face of the gasket 15 beingthereby brought to bear against the rim 4 and main; tained in closecontact therewith by the pres sure of the cap. If the contents of thejar l lIIPOSitiOIl, by which an hermetic closure will be effected. If,on the other hand, the

contents of the jar are filled in while hot,

. the ;cap' may be heldapplied to the jar to retain the seal in positionuntil the rarefied air in the neck of the jar above the contents iscondensed andforms a partial Ivacuum,

' whereby the seal'will', upon the removal of I the cap, be held firmlyin position to close the jar by external atmospheric pressure.

Under such conditions, it may be advisable to make the gasket or sealingring of a fibrous material and wax, as the latter will a be fused by theheat of the contents and thus become cemented to the rim 3, making theseal absolutely proof against leak'a 'e. It will thus be seen that theseal may he employed in connection with an ordinary screw cap to securea tight closure, inthe event that a vacuum holding action is not desiredor cannot be attained, or thatjhc cap maybe used simply as a medium forholding the seal in place until a vacuum is formed. It will be observedthat when the cap and seal are laced in position, the seal 'W lll beheld agalnst lateral shifting by its 1 receiving seat in the cap and thebeveled portion 9, sov that it will be accurately brought intoengagement with the rim 3 of the jar, without any further care or attenition on the part of the operator other than is required to apply the capto the jar in the of cap which may be employed if desired,

the said cap having a depressed panel 16 forming the receiving groove'8, the lining 6 being dispensed with, but the construction of the capbeing otherwise the same.

Having thus described my invention, I claim i p In [a vacuum jar seal,the combination with a screw cap havin portions forming a retainingrecess and eveled guide surfaces leading thereto, of a seal comprising adisk having an oflfset peri heral portion extending from its upper si e,said ofi'set portion bein bent to provide inner and outer parallelanges, conver ing walls above said flanges forming bevele faces toengage the retaining recess and beveled guidm surfaces of the cap, and aseal fitted 1n the CHARLES R. KEERAN.

Witnesses:

BRUCE L. CROSTHWAIT, CLYDE E. SHOPE.

